The real reason they are not selling watches in the stores is that Apple is "learning" what models sell in each specific area. There are simply too many models to stock in each store and there is a high risk of oversupply and undersupply of each model which leads to even more shortages. Once Apple has a better handle on what to stock at each store, they will begin selling there.

Well, of course they are. Any decent tech company has dozens of active prototypes that are tested for years before a decision is made to go to market.
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